Suitable for various scenes: thermal vest to help you through the winter easily. Ideal for outdoor activities such as snowmobiling, motorcycling, mountaineering, camping, hiking, skiing, fishing, hunting or office daily and business activities. Suitable for autumn and winter use. 1. Integrated heating module. smart heating 2. Waterproof, safe and easy to wash process design 3. Infrared heating, no harmful radiation, stable performance, soft and comfortable Single hole 9 zone heating Color: black red Heating in cold winter and locking temperature to keep warm Temperature control electric heating vest Dual control thermostat, electric heating, comfortable and warm Electric black technology carbon fiber heating wire Constant temperature system, long-lasting temperature lock Fast fever Instantly heats up in seconds Safer than ordinary vests, 3 times hotter, heat conversion rate as high as 95%, no leakage and no radiation Size S Bust: 51CM Hem: 41CM Shoulder: 39.1 Size M Bust: 53CM Hem: 44CM Shoulder: 42 Size L Bust: 55CM Hem: 46CM Shoulder: 44 Size XL Bust: 57CM Hem: 48CM Shoulder: 46 Size 2XL Bust: 59CM Hem: 50CM Shoulder: 48 Size 3XL Bust: 61CM Hem: 52CM Shoulder: 49 Size 4XL Bust: 63CM Hem: 54CM Shoulder: 50.5